CVE-2023-49555

MEDIUMNVD 5.55.5—Elevated

5.5

An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 56.2%
KEV: Not listed

Published

January 3, 2024

Last Modified

June 17, 2025

References (2)

cve@mitrehttps://github.com/yasm/yasm/issues/248
af854a3a-2127-422b-91ae-364da2661108https://github.com/yasm/yasm/issues/248

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-400Uncontrolled Resource Consumption (Denial of Service)

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2023-495552025-09-03
An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component.

Data Freshness Timeline

(refreshed 16× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:46 UTCepss_batch
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Frequently asked(5)

What is CVE-2023-49555?

CVE-2023-49555 is a medium vulnerability published on January 3, 2024. An issue in YASM 1.3.0.86.g9def allows a remote attacker to cause a denial of service via the expand_smacro function in the modules/preprocs/nasm/nasm-pp.c component.

When was CVE-2023-49555 disclosed?

CVE-2023-49555 was first published in the National Vulnerability Database on January 3, 2024, with the most recent update on June 17, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-49555 actively exploited?

CVE-2023-49555 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-49555?

CVE-2023-49555 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2023-49555?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-49555, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-49555

Published

Last Modified

References (2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-49555?

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Same CWE

CVE-2023-49555

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-49555?

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Frequently asked(5)

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